Adding to the mix:
My template is:
120 archery
115 bushido
115 tactics
100 anatomy
100 meditation
95 healing
70 chivalry
Every once in a while I stone off bushido for 120 mace fighting (hence the 70 chiv in place of the 75 that fits), but that's a different subject entirely.
Crossbows and heavy crossbows are slow enough that I never run out of mana with only lightning strike, divine fury, enemy of one and consecrate weapon.
My "wait for mana" time is only minimal with my composite using frequent (one shot in 4) armor ignores.
But if you can fit mana leech on a bow, there's no reason in the world to have meditation or focus outside of PvP. So in this case, having an alternate skill, such as resist, necromancy, etc, could be very handy indeed.